fix(mongo): db.totalSize can be undefined, fix #568 (#592)

koishijs · Apr 5, 2022 · 1fad834 · 1fad834
1 parent b4dd6e6
commit 1fad834
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/plugins/database/mongo/src/index.ts b/plugins/database/mongo/src/index.ts
@@ -119,10 +119,14 @@ class MongoDatabase extends Database {
 
   async stats() {
     // https://docs.mongodb.com/manual/reference/command/dbStats/#std-label-dbstats-output
-    const [{ totalSize }, tables] = await Promise.all([
+    const [stats, tables] = await Promise.all([
       this.db.stats(),
       this._collStats(),
     ])
+    // While MongoDB's document above says that the `stats.totalSize` is the sum of
+    // `stats.dataSize` and `stats.storageSize`, it's actually `undefined` in some cases.
+    // So we have to calculate it manually.
+    const totalSize = stats.indexSize + stats.storageSize
     return { size: totalSize, tables }
   }